The contents
of this report does not necessarily reflect the official opinions of the European
Environment Agency, the European Commission or other EU institutions. Neither the European
Environment Agency, nor any person or company acting on behalf of the Agency is
responsible for the use which may be made of the information contained in this report.

Cataloguing data can be found at the
end of this publication.
Luxembourg: Office for Official Publications of the European Communities, 1997.
ISBN XXXXXXXXXXXXXXX
Ó EEA, Copenhagen 1997

Reproduction is authorised, except
for commercial purposes, provided the source is acknowledged.